It's nearly-OT but there's quite a bit about multimedia production /
music for linux here http://linuxaudio.org/ btw - theoretically
alot of this should work if the audio + midi layer can be made
to work - and some of it already probably does

a severly time-deprived side project of mine is trying to get
as much of this stuff tested or working on DragonFly as I can.

although I didn't have enough SHM configured for jack,
and it therefore didn't make sound -
and dynamically setting SHM freaked out my dev box -
I've subsequently been too involved with web stuff and
to risk the crash..

(see time-deprived)

Is MIDI I/O supported in the kernel? The driver is snd_ich; does that kind of
card support MIDI?